Not impossible, several options are still out there if you actually search for "non smart TV" on retailers' websites.
Sceptre was one brand that made decent non-smart TVs but they seem to be vanishing off the market now. Many used ones still on ebay and other secondhand markets. Their website still shows a bunch of TV models but the retail links turn up empty.
Razer mice have some crapware that auto-installs on Windows now, through windows update. Their official driver that it downloads adds the crap and Microsoft just lets it do it all.
No such hassles on Linux though.